<template>
  <div class="roles">
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card class="box-card">
      <!-- 添加用户按钮 -->
      <div>
        <el-button type="primary">添加用户</el-button>
      </div>
      <!-- 表格区域 -->
      <el-table :data="roleList" style="width: 100%" stripe border>
        <!-- 表格扩展部分 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="6">
                <el-tag
                  @close="removeRightById(scope.row, item1.id)"
                  closable
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级三级权限 -->
              <el-col :span="18">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 != 0 ? 'bdtop' : '', 'vcenter']"
                >
                  <el-col :span="8">
                    <el-tag
                      type="success"
                      @close="removeRightById(scope.row, item2.id)"
                      closable
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="16">
                    <el-tag
                      v-for="(item3, i3) in item2.children"
                      type="warning"
                      :key="i3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="roleName" label="角色名称" min-width="20%">
        </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述" min-width="20%">
        </el-table-column>
        <el-table-column label="操作" min-width="45%">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini"
              >编辑</el-button
            >
            <el-button type="danger" icon="el-icon-delete" size="mini"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      :append-to-body="true"
      :close-on-click-modal="false"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      roleList: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      // 默认选中的节点ID值数组
      defKeys: [],
      // 当前分配权限的用户ID
      roleId: "",
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    // 获取所有角色列表
    getRolesList: async function () {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status != 200)
        return this.$message.error("获取角色列表失败");
      this.roleList = res.data;
      // console.log(this.roleList);
    },
    // 根据ID删除对应权限
    removeRightById: async function (role, rightId) {
      const confirmResault = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);

      if (confirmResault !== "confirm") {
        return this.$message.info("删除操作已取消");
      }

      const { data: res } = await this.$http.delete(
        `/roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status != 200) return this.$message.error("删除权限失败");
      role.children = res.data;
      this.$message.success("删除成功");
    },
    // 展示分配权限的对话框
    showSetRightDialog: async function (role) {
      this.roleId = role.id;
      this.setRightDialogVisible = true;
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200)
        return this.$message.error("获取权限列表失败");

      // 递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys);
      //获取到的权限数据保存到data中
      this.rightsList = res.data;
    },
    // 通过递归的形式获取所有权限的id保存到defKeys数组
    getLeafKeys: function (node, arr) {
      if (!node.children) {
        // 如果当前node节点不包含node属性，则是3级节点
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed: function () {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    allotRights: async function () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];

      console.log(keys);

      const idStr = keys.join(",");

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );

      if (res.meta.status !== 200) return this.$message.error("分配权限失败");

      this.$message.success("分配权限成功");
      this.getRolesList()
      this.setRightDialogVisible = false;
    },
  },
};
</script>

<style lang="less" scoped>
.roles {
  margin: 0 auto;
  width: 75%;
  height: auto;
}
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>